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Electron correlation and magnetic field induced phase transitions in spin-1/2 Falicov–Kimball model on a triangular lattice

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  • Swati Pandey

    (Ewing Christian College)

  • Umesh K. Yadav

    (Ewing Christian College)

  • Pradip K. Priya

    (Ewing Christian College)

Abstract

We have studied the ground state properties of spin-1/2 Falicov–Kimball model on a triangular lattice in the presence of external magnetic field. Numerical and Monte Carlo simulation methods are employed to obtain the results. We have found that the ground state properties are significantly influenced by the onsite Coulomb correlation between itinerant and localized electrons as well as the orbital magnetic field. Only rational flux fractions are taken into consideration in each unit cell. Transition from metal to insulator phase is accompanied by phase segregation to regular/quasi-regular/mixed phase with change in magnetic field for small values of onsite Coulomb correlation. The external magnetic field facilitates metal to insulator transition even at large values of onsite Coulomb correlation with variation in the number of electrons in the system. The results obtained through this study are applicable to layered triangular lattice systems such as rare earth and transition metal dichalcogenides, cobaltates, $$GdI_{2}$$ G d I 2 , $$NaTiO_{2}$$ N a T i O 2 , $$NaVO_{2}$$ N a V O 2 etc. Further, electric and magnetic sensors and high-energy storage devices can be developed using these results. Graphic Abstract

Suggested Citation

  • Swati Pandey & Umesh K. Yadav & Pradip K. Priya, 2024. "Electron correlation and magnetic field induced phase transitions in spin-1/2 Falicov–Kimball model on a triangular lattice," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(11), pages 1-14, November.
    • Handle: RePEc:spr:eurphb:v:97:y:2024:i:11:d:10.1140_epjb_s10051-024-00812-2
    DOI: 10.1140/epjb/s10051-024-00812-2
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    References listed on IDEAS

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    1. A. P. Ramirez & R. J. Cava & J. Krajewski, 1997. "Colossal magnetoresistance in Cr-based chalcogenide spinels," Nature, Nature, vol. 386(6621), pages 156-159, March.
    2. Yasuhiro H. Matsuda & Daisuke Nakamura & Akihiko Ikeda & Shojiro Takeyama & Yuki Suga & Hayato Nakahara & Yuji Muraoka, 2020. "Magnetic-field-induced insulator–metal transition in W-doped VO2 at 500 T," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    3. Umesh K. Yadav, 2020. "Metal-insulator transition and band magnetism in the spin-1∕2 Falicov-Kimball model on a triangular lattice with external magnetic field," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 93(12), pages 1-15, December.
    4. U. Yadav & T. Maitra & I. Singh, 2011. "Thermodynamic studies of the two dimensional Falicov-Kimball model on a triangular lattice," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 84(3), pages 365-370, December.
    5. T. Maitra & A. Taraphder & A. N. Yaresko & P. Fulde, 2006. "Magnetic properties of doped GdI 2," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 49(4), pages 433-439, February.
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